<template>
  <div v-click-outside="close" @click="toggle" ref="container" class="sn-select" :class="{ 'sn-select--open': isOpen, 'sn-select--blank': !valueLabel, 'disabled': disabled }">
    <slot>
      <button ref="focusElement" class="sn-select__value">
        <span>{{ valueLabel || (placeholder || i18n.t('general.select')) }}</span>
      </button>
      <i class="sn-icon" :class="{ 'sn-icon-down': !isOpen, 'sn-icon-up': isOpen}"></i>
    </slot>
    <div :style="optionPositionStyle" class="py-2.5 bg-white z-10 shadow-sn-menu-sm rounded"
      :class="{ 'hidden': !isOpen }"
    >
      <div v-if="withClearButton" class="px-2 pb-2.5">
        <div @mousedown.prevent.stop="setValue(null)"
             class="btn btn-light !text-xs pl-3 active:bg-sn-super-light-blue"
             :class="{
               'disabled cursor-default': !value,
               'cursor-pointer': value,
             }">
          {{ i18n.t('general.clear') }}
        </div>
      </div>
      <perfect-scrollbar ref="optionsContainer"
                         class="sn-select__options !relative !top-0 !left-[-1px] !shadow-none scroll-container px-2.5 pt-0 block"
                         :class="{ [optionsClassName]: true }"
                         @ps-scroll-y="onScroll"
      >
        <div v-if="options.length" class="flex flex-col gap-[1px]">
          <div
            v-for="option in options"
            :key="option[0]"
            @mousedown.prevent.stop="setValue(option[0])"
            class="sn-select__option p-3 rounded shadow-none option-label"
            :title="option[1]"
            :class="{
              'select__option-placeholder': option[2],
              '!bg-sn-super-light-blue': option[0] == value,
            }"
          >
            {{ option[1] }}
          </div>
        </div>
        <template v-else>
          <div
            class="sn-select__no-options"
          >
            {{ this.noOptionsPlaceholder }}
          </div>
        </template>
      </perfect-scrollbar>
    </div>
  </div>
</template>
<script>
import { vOnClickOutside } from '@vueuse/components';

export default {
  name: 'Select',
  emits: ['close', 'reached-end', 'open', 'change'],
  props: {
    withClearButton: { type: Boolean, default: false },
    withEditCursor: { type: Boolean, default: false },
    value: { type: [String, Number] },
    options: { type: Array, default: () => [] },
    initialValue: { type: [String, Number] },
    placeholder: { type: String },
    noOptionsPlaceholder: { type: String },
    className: { type: String, default: '' },
    optionsClassName: { type: String, default: '' },
    disabled: { type: Boolean, default: false }
  },
  directives: {
    'click-outside': vOnClickOutside
  },
  data() {
    return {
      isOpen: false,
      optionPositionStyle: '',
      currentContentHeight: 0
    };
  },
  computed: {
    valueLabel() {
      const option = this.options.find((o) => o[0] === this.value);
      return option && option[1];
    }
  },
  mounted() {
    document.addEventListener('scroll', this.updateOptionPosition);
  },
  beforeUnmount() {
    document.removeEventListener('scroll', this.updateOptionPosition);
  },
  methods: {
    toggle() {
      this.isOpen = !this.isOpen;

      if (this.isOpen) {
        this.$emit('open');
        this.$nextTick(() => {
          this.$emit('focus');
          this.$refs.focusElement?.focus();
        });
        this.$refs.optionsContainer.scrollTop = 0;
        this.updateOptionPosition();
      } else {
        this.close();
      }
    },
    onScroll() {
      const scrollObj = this.$refs.optionsContainer.ps;

      if (scrollObj) {
        const reachedEnd = scrollObj.reach.y === 'end';
        if (reachedEnd && this.contentHeight !== scrollObj.contentHeight) {
          this.$emit('reached-end');
          this.contentHeight = scrollObj.contentHeight;
        }
      }
    },
    close() {
      this.isOpen = false;
      this.optionPositionStyle = '';
      this.$refs.optionsContainer.$el.scrollTop = 0;
      this.$emit('close');
    },
    setValue(value) {
      this.$emit('change', value);
    },
    updateOptionPosition() {
      const container = $(this.$refs.container);
      const rect = container.get(0).getBoundingClientRect();
      const { width } = rect;
      const { height } = rect;
      let top = rect.top + rect.height;
      let { left } = rect;

      const modal = container.parents('.modal-content');

      if (modal.length > 0) {
        const modalRect = modal.get(0).getBoundingClientRect();
        top -= modalRect.top;
        left -= modalRect.left;
        this.optionPositionStyle = `position: fixed; top: ${top}px; left: ${left}px; width: ${width}px`;
      } else {
        container.addClass('relative');
        this.optionPositionStyle = `position: absolute; top: ${height}px; left: 0px; width: ${width}px`;
      }
    }
  }
};
</script>
